underground UL-58 & 1746 tanks

Our underground steel tanks provide superior structural strength and product compatibility. Designed to withstand the rigors of the underground environment, they are serviceable for storing of a wide range of petroleum products and other hazardous liquids. Tank dimensions and thicknesses are calculated in strict compliance with Roark’s Formulas for Stress and Strain as presented in UL-58. In addition, customization to suit your requirements is always available. A variety of industry-proven corrosion protection systems can be selected to be installed using a variety of backfill materials. Capacities from 240-60,000 gallons, exterior full fillet lap joints, striker plates under every opening, seam inspection, and 5 psi factory air test. Underground double-wall tanks are shipped with a vacuum on the interstice, eliminating the need for on-site leak testing

Applicable Standards
  • UL 1746

    Standard for External Corrosion Protection Systems...

  • UL 58

    Standard for Steel Underground Tanks for Flammable...

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